Gear rack type telescopic tail device and adjusting method

The invention relates to a gear rack type telescopic tail device which comprises a main guide rail fixed on the ground and a movable tail arranged on the main guide rail in a reciprocating mode in the length direction, and further comprises a self-adaptive belt supporting mechanism matched with the movable tail. One end of the movable machine tail can extend into a fixed rack of the self-adaptive belt supporting mechanism, a walking wheel assembly rolling along the main guide rail in a matched mode is installed on the lower surface of the movable machine tail frame, and a rack pushing mechanism driving the movable machine tail frame to move in a reciprocating mode relative to the main guide rail is arranged below the movable machine tail frame. The adjusting method utilizing the gear and rack type telescopic tail device has the following beneficial effects that the tail for receiving the discharged material of the material bin is mainly improved, the problem that the material of the coal bin is difficult to f